In quarantine, over by one of the walls, there is a makeshift desk, behind which is a Dwarf, his feet up, seemingly at ease with the fact that he's locked in. Behind the dwarf is something a bit more interesting. There's a black circle, seemingly hung on the wall, and through the circle are a number of small shelves, packed tightly with various items. The really strange thing is that on next to the black circle is a doorway, which leads to a hallway, that goes right behind the wall, and logically, should go straight through the room behind the desk. However it's not there. 

As you approach the desk, the Dwarf perks up and gets to his feet. "Hey there! Neat stuff, eh? I figure if we're stuck here, well, may as well have something entertaining. Want to take a look at what I've got? Or maybe you've got something to sell? Hard coin for rifter artifacts! I've got someone trying to get a full set of Ids, It's a seller's market!"